Investigation and Development of 3D Printed Biodegradable PLA as Compact Antenna for Broadband Applications

Kumar, Pramod; Dwari, Santanu; Utkarsh, .; Singh, Shailendra; Kumar, Jitendra

doi:10.1080/03772063.2018.1474140

Cited by 11 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A recent example concerning the adoption of fused deposition modeling (FDM) to fabricate DRAs having different shapes was proposed in [19], [20], [12]. Specifically, rectangular, spherical, triangular [19], and 3D quadrupole-shaped DRAs for WI-LAN and 5G communications were manufactured by means of poly lactic acid (PLA), a biodegradable thermoplastic featuring ε r = 3.48 and negligible loss tangent [20], [12]. Additionally, in [12], the same 3D quadrupole shaped geometry was also fabricated by means of SLA, considering photopolymer resin as material.…”

Section: Introductionmentioning

confidence: 99%

Design and Manufacturing of Super-Shaped Dielectric Resonator Antennas for 5G Applications Using Stereolithography

et al. 2020

View full text Add to dashboard Cite

In this work, the inverted micro-Stereolithography (SLA) is used to show the potential of such additive manufacturing (AM) technology at prototyping super-shaped dielectric resonator antennas (S-DRAs) rapidly and accurately. The S-DRAs, which exhibit 3D complex geometries, were designed to operate at 3.5 GHz, suitable for the assessment of 5G communications in the mid band. Initially, a cross-starred-shaped S-DRA was designed and manufactured via the inverted micro-SLA by means of a photopolymer resin as material. As no information about the used material was available from literature and supplier, the dielectric properties of the photopolymer resin were characterized. Moreover, in the view of challenging further the SLA capability, several prototypes, based on the cross star shaped geometry but exhibiting a twist of variable angles along the longitudinal axis, were fabricated and tested. In order to compare the antennas performance in relation to the material volume and sizes, rectangular and cylindrical DRAs were also realized using same material and technology. Scattering parameter S 11 , gain, bandwidth (BW), efficiency and co-and cross-polarization of all antennas were measured. The experimental results showed that twisted S-DRAs exhibit same performance of the basic cross-starred-shaped antenna, due to the invariance to symmetry of the basic Gielis geometry. The measured gain is about 2.5 dB over a range of 1 GHz in the frequency range of interest; the BW measured for all S-DRAs is about 10%, whereas the efficiency is about 80% at 3.5 GHz. Finally, better performance in terms of bandwidth is shown by the S-DRAs, considering their dramatic volume reduction (∼85%) compared to classic rectangular and cylindrical DRAs and other DRA examples already reported in the state of the art.

show abstract

Section: Introductionmentioning

confidence: 99%

Design and Manufacturing of Super-Shaped Dielectric Resonator Antennas for 5G Applications Using Stereolithography

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The optimized dimensions of the resonator were L r = 26.2 mm, W r = 26.2 mm, and H r = 45.8 mm. It was composed of polylactic acid (PLA) with dielectric constant ε r = 3.549 [37,38]. High-permittivity resonators (ε r up to 140 [12]) can be used if compact sizes are needed, but at a high cost.…”

Section: Design Of Dra Array Unit Cellmentioning

confidence: 99%

“…Despite the fact that PLA dielectric constant should be about 3.5 at a frequency range around 4 GHz [37,38], the value practically depends on 3D manufacturing properties such as printing temperature [47] and printing resolution [48]. Hence, by considering actual manufacturing conditions (printing temperature of 220 • C and layer thickness of 50 µm) and at the used frequency band, the dielectric constant would be affected to be slightly smaller (around 2.7) [47][48][49][50].…”

Section: Fabrication and Measurementsmentioning

confidence: 99%

Standing-Wave Feeding for High-Gain Linear Dielectric Resonator Antenna (DRA) Array

Abdalmalak

Althuwayb

Lee

et al. 2022

Sensors

View full text Add to dashboard Cite

A novel feeding method for linear DRA arrays is presented, illuminating the use of the power divider, transitions, and launchers, and keeping uniform excitation to array elements. This results in a high-gain DRA array with low losses with a design that is simple, compact and inexpensive. The proposed feeding method is based on exciting standing waves using discrete metallic patches in a simple design procedure. Two arrays with two and four DRA elements are presented as a proof of concept, which provide high gains of 12 and 15dBi, respectively, which are close to the theoretical limit based on array theory. The radiation efficiency for both arrays is about 93%, which is equal to the array element efficiency, confirming that the feeding method does not add losses as in the case of standard methods. To facilitate the fabrication process, the entire array structure is 3D-printed, which significantly decreases the complexity of fabrication and alignment. Compared to state-of-the-art feeding techniques, the proposed method provides higher gain and higher efficiency with a smaller electrical size.

show abstract

“…Принципиальная схема экспериментального стенда представлена на рисунке 4. Полилактид (PLA-пластик) является одним из наиболее экологически чистых материалов, применяемых для трехмерной печати, и таким образом практически идеально подходит для проведения экспериментов ввиду свойства биоразлажения [15].…”

Section: методика экспериментальных исследованийunclassified

Effects of a rough surface vortex breaker hydrocyclone on the separating capacity of heterogeneous fluid systems

Башмур¹,

Petrovsky²,

Tynchenko³

et al. 2021

SOCAR Proceedings

View full text Add to dashboard Cite

This paper considers the issue of heterogeneous system separation efficiency under the action of centrifugal forces working in hydrocyclones. The main problem with these apparatuses is related to vortex forming. The paper describes the negative effects of vortexes on the heterogeneous medium separation process. A hydrocyclone design was developed and described, which improves the hydrocyclone separation capacity. This design introduces a vortex breaker. Furthermore, vortex formation can be eliminated or minimized by providing the vortex breaker with a rough surface. To determine the separation efficiency and the adequacy of the proposed solution, hydrodynamic computer simulation and experimental studies were conducted. Solidworks Flow Simulation software was used for hydrodynamic computer simulation. To check the medium separation degree, an experimental study was conducted showing improvement of the hydrocyclone separation capacity efficiency by 3% in the developed apparatus compared to conventional hydrocyclone designs. Keywords: hydrocyclone; separation; separating capacity; vortex breaker; heterogeneous system; oil preparation; hydrodynamics.

show abstract

Investigation and Development of 3D Printed Biodegradable PLA as Compact Antenna for Broadband Applications

Cited by 11 publications

References 9 publications

Design and Manufacturing of Super-Shaped Dielectric Resonator Antennas for 5G Applications Using Stereolithography

Design and Manufacturing of Super-Shaped Dielectric Resonator Antennas for 5G Applications Using Stereolithography

Standing-Wave Feeding for High-Gain Linear Dielectric Resonator Antenna (DRA) Array

Effects of a rough surface vortex breaker hydrocyclone on the separating capacity of heterogeneous fluid systems

Contact Info

Product

Resources

About